Publication detail

Cyclic plastic behavior and fatigue life of AZ91 alloy in as-cast and ultrafine-grained state

FINTOVÁ, S. KUNZ, L.

Original Title

Cyclic plastic behavior and fatigue life of AZ91 alloy in as-cast and ultrafine-grained state

English Title

Cyclic plastic behavior and fatigue life of AZ91 alloy in as-cast and ultrafine-grained state

Type

journal article - other

Language

en

Original Abstract

Fatigue properties of magnesium alloy AZ91 in as-cast and in ultrafine-grained state prepared by equal channel angular pressing were investigated. The fatigue strength in the low-cycle fatigue region was found to be substantially improved by the severe plastic deformation, whereas the improvement in the high-cycle fatigue region is negligible. The cyclic plastic response in both states is qualitatively similar; short initial softening is followed by a long cyclic hardening. The observed fatigue behavior was discussed in terms of specific microstructural features of both states and on the basis of cyclic slip localization and fatigue crack initiation.

English abstract

Fatigue properties of magnesium alloy AZ91 in as-cast and in ultrafine-grained state prepared by equal channel angular pressing were investigated. The fatigue strength in the low-cycle fatigue region was found to be substantially improved by the severe plastic deformation, whereas the improvement in the high-cycle fatigue region is negligible. The cyclic plastic response in both states is qualitatively similar; short initial softening is followed by a long cyclic hardening. The observed fatigue behavior was discussed in terms of specific microstructural features of both states and on the basis of cyclic slip localization and fatigue crack initiation.

Keywords

AZ91; ECAP; Bimodal structure; Fatigue; Plastic deformation; Crack initiation.

RIV year

2014

Released

15.09.2014

Pages from

109

Pages to

115

Pages count

7

URL

BibTex


@article{BUT109823,
  author="Stanislava {Fintová} and Ludvík {Kunz}",
  title="Cyclic plastic behavior and fatigue life of AZ91 alloy in as-cast and ultrafine-grained state",
  annote="Fatigue properties of magnesium alloy AZ91 in as-cast and in ultrafine-grained state prepared by equal channel angular pressing were investigated. The fatigue strength in the low-cycle fatigue region was found to be substantially improved by the severe plastic deformation, whereas the improvement in the high-cycle fatigue region is negligible. The cyclic plastic response in both states is qualitatively similar; short initial softening is followed by a long cyclic hardening. The observed fatigue behavior was discussed in terms of specific microstructural features of both states and on the basis of cyclic slip localization and fatigue crack initiation.",
  chapter="109823",
  howpublished="online",
  number="3",
  volume="21",
  year="2014",
  month="september",
  pages="109--115",
  type="journal article - other"
}